Pyonephrosis CT

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Harsh Vardhan Chawla, M.B.B.S.[2]

CT scan

CT scan provides anatomic details and helps in distinguishing intra-renal and extra renal pathologies.

It is difficult to distinguish hydronephrosis from pyonephrosis on CT scan.

The indirect signs of pyonephrosis on CT scan include:

Enlarged kidneys

Presence of an infected collecting system in the setting of hydronephrosis.

Perinephric fat stranding

Striated nephrogram

Pelvic wall thickening

Fluid-fluid levels and gas within the collecting system can sometimes be seen

Other conditions like neoplasms